# 2 线程优先级队列
import threading
import queue
import time

exitflag = 0


class MyThread(threading.Thread):
    def __init__(self, threadID, name, q):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.q = q

    def run(self):
        print("开启线程:" + self.name)
        process_data(self.name, self.q)
        print("退出线程:" + self.name)


def process_data(threadName, q):
    while not exitflag:
        queueLock.acquire()  # -------------------------------------------
        print(threadName + "获取锁")
        if not workQueue.empty():
            data = q.get()  # 获取队列-------------------------------------可以不加Lock吗
            print("获取队列" + data)

            print(threadName + "释放锁")
            queueLock.release()  # -----------------------------------------
            print("%s processing %s " % (threadName, data))
        else:
            print(threadName + "释放锁")
            queueLock.release()
        time.sleep(1)


threadList = ["Thread-1", "Thread-2", "Thread-3"]
nameList = ["One", "Two", "Three", "Four", "Five"]
queueLock = threading.Lock()
workQueue = queue.Queue(10)
threads = []
threadID = 1

# 创建新线程
for tName in threadList:
    thread = MyThread(threadID, tName, workQueue)
    thread.start()
    threads.append(thread)
    threadID += 1
# 填充队列
queueLock.acquire()
for word in nameList:
    workQueue.put(word)
    print("写入队列" + word)
queueLock.release()

# 等待队列清空
while not workQueue.empty():
    pass

# 通知线程是时候退出
exitflag = 1

# 等待所有线程完成
for t in threads:
    t.join()
print("退出主线程")
